Prompt gamma-ray analysis (PGA) of meteorite samples, with emphasis on the determination of Si
Prompt gamma-ray analysis (PGA) of meteorite samples, with emphasis on the determination of Si
复制标题
对陨石样品进行快速伽马射线分析 (PGA)，重点是 Si 的测定
DOI：
10.1007/bf02349072
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发表时间：
1999
影响因子：
1.6
通讯作者：
H. Sawahata
中科院分区：
文献类型：
--
作者：
Shaikh Abdul Latif;Y. Oura;M. Ebihara;G. Kallemeyn;H. Nakahara;C. Yonezawa;T. Matsue;H. Sawahata
对7个陨石样品（阿连德、Zagami、Acfer 209、ALH 77005、ALH 84001、EET 79001和Neagari）进行了中子诱导瞬发γ射线分析（PGA）。在JAERI的JRR-3 M的热中子和冷中子引导束中辐照样品。使用两种不同的方法分析多个阿连德标准粉末样品中的硅：（1）比较方法，使用硅标准，和（2）单标准方法，使用铁作为内部参考元素。用这两种方法测定的Si浓度与文献值吻合较好。用冷中子导向束对硅的分析灵敏度比用热中子导向束高14.3倍。测定的其它元素（B、Ca、Ti和S）也显示出使用冷中子束的较高灵敏度。研究的其他陨石显示出一些异常的B和S值，可能是由于陆地风化/污染的影响。
Neutron-induced prompt gamma-ray analysis (PGA) was applied to seven meteorite samples (Allende, Zagami, Acfer 209, ALH77005, ALH84001, EET79001 and Neagari). Samples were irradiated in both the thermal neutron and the cold neutron guided beams of JRR-3M at JAERI. Multiple samples of an Allende standard powder were analyzed for Si using two different methods: (1) the comparison method, using a Si standard, and (2) the mono-standard method, using Fe as an internal reference element. The Si concentrations determined by these two methods are in good agreement with literature values. The analytical sensitivity for Si using the cold neutron guided beam is∼14.3× higher than that for the thermal neutron guided beam. Other elements determined (B, Ca, Ti and S) also showed higher sensitivities using the cold neutron beam. The other meteorites studied showed some anomalous B and S values likely due to the effects of terrestrial weathering/contamination.